Could a plain Jane 69 come with disc/drum set up? And could an SS come without a rear deck lid Camaro logo on it?

Disc brakes could be ordered on any car regardless of trim/model. It was a RPO.

Trunk lid "Camaro by Chevrolet" should be on all cars. Cars that have had the rear spoiler added afterwards could be without the emblem, as well as those in which the lid has been replaced.